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Effects of Dystocia on the Postpartum Complications, Milk Production and Reproductive Performance in Dairy Cows -
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저자 Dong-Uk Kim Soo-Chan Lee Jae-Kwan Jeong In-Soo Choi Sung-Ho Moon Hyun-Gu Kang Ill- Hwa Kim
발행기관 한국임상수의학회
간행물정보 한국임상수의학회지 2016년, 한국임상수의학회지 제33권 제2호, 87page~92page(총6page)
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연관 논문
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논문 ; 영양 사료 : 젖소에 대한 성장호르몬 ( rbST ) 투여가 유생산 , 유성분 및 호르몬 수준변화에 미치는 영향 ( Articles ; Nutrition and Feed Resources : Effect of Recombinantly Derived Bovine Somatotropin ( rbST ) Injection on Milk Productivity , Milk Composition , and Hormone Responses in Dairy
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목차
부제 :
Abstract
Introduction
Materials and Methods
Results
Discussion
References
 
 
영문초록
This field study investigated the effects of dystocia on the postpartum complications, milk production, and reproductive performance in Holstein dairy cows. Calving difficulty was scored on a rank scale of 1 to 5. Cows with a calving score of three or higher were judged to have dystocia. The cows (n = 565) were categorized based on the presence (n = 61) or absence (n = 504, control) of dystocia. The incidence of retained placenta (45.9% vs. 16.3%), metritis (39.3% vs. 17.1%), endometritis (47.5% vs. 16.3%) and pyometra (9.8% vs. 1.2%) were greater in cows from the dystocia group than those from the control group (p < 0.0001); however, there was no difference in the incidence of metabolic disorders (32.8% vs. 31.0%) between the two groups (p > 0.05). The prevalence of culling was higher in cows from the dystocia group (26.2%) than in those from the control group (14.5%, p < 0.05). During the 5-month postpartum period, milk production was lower (p < 0.05) in cows from the dystocia group than in those from the control group. Furthermore, the hazard of insemination by 150 days in milk (DIM) was lower in cows from the dystocia group (hazard ratio [HR] = 0.64, p < 0.005) than in those from the control group. Logistic regression analysis revealed that the odds ratio for the probability of pregnancy after the first artificial insemination was 0.36 times (p < 0.05) higher in cows from the dystocia group than in those from the control group. The hazard of pregnancy by 360 DIM was lower in cows from the dystocia group (HR = 0.45, p = 0.0001) than in those from the control group. In conclusion, dystocia resulted in increased postpartum complications, and decreased milk production and reproductive performance in Holstein dairy cows, leading to increased culling.
 
 
dairy cows, dystocia, postpartum complications, milk production, reproductive performance
 
 
도움말
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